CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,755	$ 22,013
Short-term investments	17,583	16,583
Accounts receivable, net	27,895	33,156
Current maturities of notes receivable	63	695
Prepaid expenses and other current assets	11,816	7,340
Total current assets	84,112	79,787
Property and equipment, net	75,469	86,573
Notes receivable, net of current maturities	1,473	841
Intangibles, net	433	494
Long-term deferred tax assets, net	224	224
Total assets	161,711	167,919
Current liabilities:
Accounts payable	7,629	5,933
Accrued liabilities:
Payroll costs and other taxes	1,109	1,151
Other	4,479	4,314
Deferred revenue	7,103	6,314
Current maturities of notes payable and obligations under capital leases	2,965	2,712
Total current liabilities	23,285	20,424
Long-term liabilities:
Notes payable and obligations under capital leases, net of current maturities	3,736	5,153
Deferred tax liabilities, net	666	874
Other accrued liabilities	150	150
Total long-term liabilities	4,552	6,177
Commitments and contingencies
Stockholders' equity:
Preferred stock-par value $1.00 per share; 4,000,000 shares authorized, none outstanding
Common stock-par value $0.01 per share; 35,000,000 shares authorized, 22,964,444 and 22,926,805 shares issued, and 22,915,999 and 22,878,360 shares outstanding at June 30, 2018 and December 31, 2017, respectively	229	229
Additional paid-in capital	152,548	151,881
Retained deficit	(17,531)	(10,012)
Treasury stock, at cost; 48,445 shares at June 30, 2018 and December 31, 2017
Accumulated other comprehensive loss, net	(1,372)	(780)
Total stockholders' equity	133,874	141,318
Total liabilities and stockholders' equity	$ 161,711	$ 167,919

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.